Like button from Facebook could be placed on the mobile web pages too. And if this mobile page is devoted to some real business (place, location) than the word "Like" has got a very real sense – who from your real friends recommends this business.
Our new mashup Place card is an example for such kind service. This mashup lets you create a short mobile page with business description (text, address, contact phone and email) as well as an appropriate QR-code. This mobile page contains Facebook Like button. This QR-code could be placed on the real objects. So as soon as this page is scanned your visitor will see who from his/her friends in the social network likes (recommends) this business.